Albert lantzke



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A. LANTZKB.

NoN-CONDUGTING GOVERING. No. 563,7;75. Patented July 14, 1896.

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UNITED STATES EricE.

PATENT ALBERT LANTZEE, or EAfrn EEA-Aon, NEW YORK, Assionon rro THE NEW vont: Asnnsios MANUEAOTURING COMPANY, or NEW YORK, N. Y.

NON-CONDUCTING COVERING.

SPECIFICATION forming* part 0f Letters Patent N0. 563,775, dated. July 14, 1896.

Application filed December 26, 1893. Serial Ilo. 494,721. (N0 specimens.)

To @ZZ whom, it um?! concern:

Be it known that l, ALBERT LANTZKE, a citieen of the United States, residing at Bath Beach, in the county of Kings and State of 5 New York, have invented certain new and useful Improvements in Manufacture of Non- Conducting Coverings, of which the following is a specification.

illy invention relates to improvements in ro non-conducting coverings for steam-boilers, pipes, cylinders, and other receptacles and conductors of steam, hot air, Water, the.; and it consists of a light, iexible covering constructed of sheets of thin non-coiiducting material, previously folded in triangular folds, forming closed spaces containing dead air within the bodyof the covering. These sheets may be made of asbestos paper or some other nonconductiug material and arranged in the 2o covering, either in alternate layers of plain and folded or of superposed layers of folded sheets only.

Various tests have proven that stagnant air is the best non-conductor of heat. Therefore such covering which contains the greatest vole urne of air will be the most effective. forking upon this principle, I succeeded in constructing a covering which contains in itself a very large number of closed and isolated airspaces. The covering is very light, easily applicable, requires a minimum of material, and its protecting efficiency is proved to exceed that of every other covering heretofore made. y

The covering can be made either cylindrical for coverings of pipes, or fiat, or curved in any form as may be required to fit the surface to be covered.

In the accompanying drawings, Figure l shows the start of the ceiling of a cylindrical pipe-covering. Fig. 2 is a cross-section of such covering when finished. Figs. 3 and et are cross sections of Vboiler coverings, showing the arrangement of the folds and of the sheets in alternate and superposed layers.

The letters o and o designate, respectively, the layers of the flat and folded sheets.

In themanufacture of my improved covering I proceed as follows:

5o First. To make a pipefcovering, I place two rolls of asbestos paper (or of other non-conducting material prepared in continuous sheet) in suitable positions and start by winding two or more fiat coils upon a revolving mandrel. Then l cement between the coils, as shown in Fig. l of the drawings, the end of the second roll,from which the sheet,before reaching the revolving mandrel, passes through a device where it is folded so as to form triangular channels running the whole width of the roll. Because of the triangular forni of the folds, each fold in itself is closed and forms an isolated air-space, and, moreover, it is therefore not necessary to insert a fiat layer between the folds to complete the formation of isolated air-spaces. Both the iiat and the fold ed sheets are then coiled in alternate layers and at the same time cemented together. W'hen the required dimension of the covering is obtained, the folded sheet is out off, and the covering is closed by one or two more coils of the fiat sheet alone. It is not absolutely necessary that the layers be ce-` mented together, and in construction of coverng for iiexible conductors and for trainpipes generally it is preferable that the coils be Wound without any ccmenting between them. This will make the pipe still more yielding and will not at all impair its nonconductivity or its durability. The covering is then out lengthwise, as shown in Fig. 2 in the accompanying drawings, and inclosed in a wrapper of suitable material, of which one end overlaps the cut and serves the purpose of closing the covering when it is set on the pipe.

Second. Coverings for boilers or other large vessels with fiat or curved surface l construct either of alternate layers of flat and folded sheets, as'shown in Fig. 3, or of superposed layers of folded sheets only. The coverings are made in similar manner as the pipe-covering by ooiling the sheets upon a large drum. The finished covering is cut and flattened or bent to fit the surface to be covered.

Coverings for boilers and for larger or liat surfaces generally may also be constructed of material previously prepared upon a table, but the ceiling upon a drum is preferable to any other method of manufacture.

I am aware that non-conducting coverings have been made of asbestos millboard or of material, previously folded in triangular folds, each closed by itself and forming an isolated air-space within the body of the covering.

In Witness whereof I have signed my name to this specification in the presence of the two Subscribing Witnesses.

ALBERT LANTZKE.

1Witn esses l J. NUSSBLATT, H. TANZER. 

